Objective-C的 - 命令行（鐺） - 打印堆棧跟蹤

Question

我想打印的堆棧跟蹤我的Objective-C程序

我在命令行中使用鐺編譯（自動引用計數）

我想了解以下內容：

1. 我一定要添加任何參數，同時編制？
2. 我是否需要添加任何代碼來啓動跟蹤並打印跟蹤？

下面給出的是，我有打印的堆棧跟蹤的一個範例程序：

#import<Foundation/Foundation.h> 

@interface Car : NSObject 
@property (weak) NSNumber* doors; 
@end 

@implementation Car 
@synthesize doors; 
@end 

int main() 
{ 
    system("clear"); 

    Car *car1 = [[Car alloc] init]; 

    NSNumber *d1 = [[NSNumber alloc] initWithInteger: 4]; 

    //I want to start printing the stack trace from this point on 
    car1.doors = d1; 

    printf("---- end\n"); 

    return(0); 
} 

命令用來編譯：

clang -fobjc-arc test.m -framework Foundation -o test 

Answer 1

#include <execinfo.h> 

void printStackTrace() { 
    void *returnAddresses[500]; 
    int depth = backtrace(returnAddresses, sizeof returnAddresses/sizeof *returnAddresses); 
    printf("stack depth = %d\n", depth); 
    char **symbols = backtrace_symbols(returnAddresses, depth); 
    for (int i = 0; i < depth; ++i) { 
     printf("%s\n", symbols[i]); 
    } 
    free(symbols); 
}